Effect of Fenugreek (Trigonella foenum-graecum L.) and Black Seed (Nigella sativa L.) Additive Intercropping on Yield and Yield Components Journal title: Iranian Journal of Field Crops Research Authors: Kh Abdollahpour,A Koocheki,M Nasiri mahalati,S Khorramdel, Subject(s): Agricultural Science, Plant Sciences